2 birch trees bought and saved!

I recently went for a conference in France.
I tried to figure out how much it cost to cancel the carbondioxide emission towards buying or planting trees.

According to http://www.terrapass.com/flight/ roughly twice the emitted carbon dioxide would cost ca 10 USD for planting new trees to cancel that amount of carbondioxide.

I would normally buy trees via Vi-skogen but this time I decided to support http://www.ettklickforskogen.se/ by buy donating enough money to buy two old birch trees (total 100 SEK).